Expanded metal.



No. 738,825. 'PATENTED SEPT. 15, 1903.

' E. A. MALLORY EXPANDED METAL. nrmonxon FILED NOV. 6, 1902.

WITNESSES:

INVENTOR Elwymiflallozg l BY 7 h ,1 i FFEL .E| TTORNEY c was PatentedSeptember 15, 1903.

ELl/VYN A. MALLORY, OF CANTON, OHIO, ASSIGNOR TO THE BERGERMANUFACTURING COMPANY, OF CANTON, OHIO.

EXPANDED METAL.

SPECIFICATION forming part of Letters Patent No. 738,825, datedSeptember 15, 1903.

Application filed November 6, 1902 Serial No. 130,240. (No model.)

To all whom it may concern:

Be it known that I, ELwYN A. MALLORY, a citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented a new and useful Expanded Metal,of which the following is aspecification.

My invention relates to a series of slits which are out or punched in asheet of metal, whereby the sheet is expanded laterally and convertedinto a perforated sheet or Web with a series of points or projections oneither side for use as metal lath or for fence-panels; and the object ofmy style and arrangement of slits is to cut the blank sheet so theexpansion is made by a positive bending or folding on longitudinal lineswithout twisting or warping the strips of metal between the definitebends. I attain this object by cutting and bending the sheet metal asillustrated in the accompanying drawings, in which- Figure 1 is a planof a sheet of metal cut for bending, showing part of the same expanded;Fig. 2, a section of the same as on line 2 2; Fig. 3, a plan of avariation of the cut, showing part of the sheet expanded; Fig. 4, asection of the same as on line 4 4, and Fig. 5 a section of the same ason line 5 5.

Similar numerals refer to similar parts throughout the drawings.

The sheet-metal blank 1 is punched or cut with a series of similar\I-shaped slits 2, located side by side along the sheet, with theintervals 3 between the adjacent free ends of the arms of the slits. Theinclination and length of the arms of the slits are varied according tothe style of expansion it is desired to make, and the joining of thearms can be angular, as at 4, or curved, as at 5, or made in such otherstyle as may be fancied or desired. Along the side of this series ofslits is cut a series of similar in verted-V-shaped slits 6, with theadjacent arms preferably parallel with the first series and the joiningof the arms located opposite the interval between the adjacent arms ofthe first series, and so on, with succeeding series of alternate V-shaped and inverted-V-shaped slits 2 and 6 2 and 6", 2 and 6, 650.,respectively, similarly arranged and located as described for the firsttwo series.

After the sheetis cut itis expanded by bending or folding the successiverows of strips formed between the cuts in alternate directions, thebends being on the lines connecting the adjacent ends of the arms of theV-shaped slits, as indicated by broken lines in the drawings. In cuttingthe slits in the metal sheet I prefer to also indent the same alongthese lines of bending or folding, the indentations 7 being made in theintervals of the alternate series of slits on opposite sides of thesheet. When this is done, the sheet is expanded laterally by merelypulling or drawing it out by its side edges, for by so doing the sheetwill bend or fold along the lines of the indentations without anywarping or twisting of the strips between the slits; but it will beunderstood that these indentations can be omitted and the various foldsmade by the other means. 7

What I claim herein as my invention, and desire to secure by LettersPatent, is-

1. An expanded metal comprising a sheet cut with alternate series of Vand inverted-V shaped slits with intervals between the adjacent slits ineach series, the sheet being bent in opposite directions on the lines ofthe intervals in the alternate series.

2. An expanded metal comprising a sheet cut with alternate series ofparallel V and inverted-V shaped slits with intervals between theadjacent slits in each series, the sheet being bent in oppositedirections on the lines of the intervals in the alternate series.

3. A metal sheet cut with alternate series of parallel \land inverted-Vshaped slits with intervals between the adjacent slits in each series,and indented on opposite sides along the lines of the intervals in thealternate series of slits.

4. A metal sheet cut with alternate series of \l and inverted-V shapedslits with intervals between the adjacent slits in each series, andindented on opposite sides along the lines of the intervals in thealternate series of slits.

In testimony whereof I have signed my name to this specificationin thepresence of two subscribing witnesses.

ELWVYN A. MALLORY.

Witnesses:

WM. I-I. Sronen, JOSEPH FREASE.

